Mechanical hammering device for use in the manufacture of boots or shoes.



PATENTED JULY 21, 1903 G. KRON. MECHANICAL HAMMERING DEVICE FOR USE INTHE MANUFACTURE OF BOOTS OR SHOES.

APPLICATION IILED SEPT. 20, 1901.

F0 MODEL.

tile. 733,974.

UNITED STATES:

Patented July 21, 1903.

PATENT OFFICE.

GEORG KRON, OF MALMC, SWEDEN.

MECHANICAL HAMMERING DEVICE FOR USE IN THE MANUFACTURE-OF BOOTS ORSHOES.

SPECIFICATION forming part of Letters Patent No. 733,974, dated July 21,1903.

Application filed September 20, 19( )1 Serial No. "75,835. (No model.)

To all whom it may concern:

Be it known that I, GEORG KRON, a subject of the Emperor of Germany,residing at Malmii, Sweden, have invented an Improved MechanicalHammering Device for Use in the Manufacture of Boots, Shoes, or theLike;

and I do herebydeclare the following totbe a full, clear, and exactdescription of the invention, such as will enable others skilledin theart to which it appertains to make and use the same, reference being badto the accompanying drawings, and to letters of reference markedthereon, which form a part of this specification.

This invention has for its object a mechanically-actuated hammer for usein shoe-making and which is especially suitable for beating the upperafter the pegging operation has taken place in order that it may fitperfectly smoothly on the welt or insole of the shoe or boot. In thisoperation it is necessary for the hammer to strike from the edge of thesole toward the center of the same, so that the shape of the shoe maynot suffer, as would be the case were the striking 'to take placevertically. In order to obtain this slanting blow, the strikingmechanism is guided in a curved course by means of a suitable linkgear,the lower oblique part of this course being utilized as thestriking-point. The edge of the sole is held against the striking-tooland gradually guided all around it, the weight of the last affordingsufficient-resistance to the comparatively light and rapidly-workinghammer or striker, so that a firm support of the last is not necessary.

Referring to the drawings, in which like parts are similarlydesignated,Figure 1 shows one form of construction of the hammer; and Fig. 2, theprongs of the contact-piece t', with the striking mechanism betweenthem.

The striking mechanism a is mounted in a guide 0, closed at the upperend and arranged on the free end of the striker-arm Z2,and is held bymeans of two springs d and e, which bear against a p'istonf on thestriker, and thus afford an elastic support to the same. The piston orcollar f may also be constructed so as to form an air-piston in order toincrease the spring action. The other end of the '7 striker-arm isguided in an are by means of a link g, while a point in the center ofthe striker-arm is carried around in a circle by means of a crank h. Thestriker-tool thus describes approximately the curve which is shown indotted lines in Fig. 1.

In order that the striker may always encounter the edge of the sole at auniform dis tance away, a forked contact-piece t' is pivoted on a boltm, along which contact-piece the edge of the sole is moved. Theregulation of the strength of stroke takes place by the last beingpressed more or less strongly against the prongsof the contact-piece t',as the latter, whose forward end ispressed downward by the spring k,yieldsuwhen the last is pressed upward and allows the last to approachthe striking-point, and consequently increases the striking action.

Having thus described my said invention,

what I claim as new therein, and desire to secure by Letters Patent, is-

1. In a machine of the class described, the combination with an arm, ahammer carried thereby, a crank connected to the arm and means to causesaid hammer to travel in substantially an elliptical path; of a forked1e- Ver, the fork thereof embracing the hammer, and means for causing adownward pressure on the forked end of the lever, substantially as setforth.

2. In a machine of the class described, the combination with an arm, aguide carried on one end thereof, a hammer, spring and air cushioned inthe guide, a crank connected to the arm intermediate its ends, and meanspivotally connected to the other end of the arm to cause the hammer totravel in a substantially elliptical path; of a pivoted lever having afork at one end and a spring pressing against the other end to cause adownward pressure on the fork, substantially as set forth. Y I 7 3. In amachine of the class described, the combination with an arm, a guideclosed at one end and carried at one end of said arm, a piston in theguide, a hammer secured to and a spring on each side 'of the piston tospring and air cushion the piston and hammer, a link pivoted at one endto a fixed element and at the other to the other end of said myinvention I have signed my name in presarm; of a leverpivotedintermediate its ends, enoe of two subscribing witnesses.

a fork on one end of the lever surrounding the hammer, and a springacting against the (IEORG KRON' 5 end of the lever to cause a downwardpres- Witnesses:

sure on the fork, substantially as set forth. N. GUST. ABERZ,

In testimony that I claim the foregoing as A. W. ANDERSON.

